KEYWORDS: Clouds, LIDAR, Raman spectroscopy, Liquids, Multiple scattering, Water, Mass attenuation coefficient, Monte Carlo methods, Scattering, Signal attenuation
Since 2010, the Lidar MARTHA at TROPOS permits the retrieval of microphysical properties of liquid-water clouds during nighttime by estimations of the multiple scattering effects with the so called dual-FOV Raman technique. A recent lidar single-FOV depolarization approach which permits the retrieval of these properties as well, was implemented in the MARTHA system. Additionally, a new simple dual-FOV depolarization approach was developed and tested in the lidar measurement for several cloud periods. The first preliminary retrieval results and a comparison between the three methods are presented.
Anatoli Chaikovsky, Michail Korol, A. Malinka, E. Zege, I. Katsev, A. Prikhach, S. Denisov, V. Dick, P. Goloub, L. Blarel, L. Chaikovskaya, A. Lapyonok, T. Podvin, N. Denishchik-Nelubina, A. Fedarenka, V. Svidinsky
The paper presents lecture materials given at the Nineteenth International Conference and School on Quantum Electronics “Laser Physics and Applications” (19th ICSQE) in 2016, Sozopol, Bulgaria and contains the results of the 10-year research of Belarusian Antarctic expeditions to study the atmospheric aerosol and Earth surface in Antarctica. The works focus on the studying variability and trends of aerosol, cloud and snow characteristics in the Antarctic and the links of these processes with the long range transport of atmospheric pollutants and climate changes.
An analytical approach for modeling Raman lidar return with multiple scattering is presented. The approach is based on a small-angle quasi-single scatteirng approximation developed earlier for elastic lidar sounding. Spatial-angular structure of Raman lidar return is investigated. For particular case of warm clouds it is shown that multiple-field-of-view lidar technique allows one to retrieve the effective size of scattering particles.
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